Getting : Warning: A string ref, "resizeObject", has been found within a strict mode tree

[pinkbrainlover]

Warning: A string ref, "resizeObject", has been found within a strict mode tree. String refs are a source of potential bugs and should be avoided. We recommend using useRef() or createRef() instead. Learn more about using refs safely here: https://fb.me/react-strict-mode-string-ref
in div (created by Panel)
in Panel (created by PanelGroup)

[faassen]

Note that you only see this is you enable React.StrictMode.

https://reactjs.org/docs/strict-mode.html